From a0c6c312d6514bcd0adbbfeea6953223a6ff0897 Mon Sep 17 00:00:00 2001
From: paulip1792 <paulip1792@outlook.com>
Date: Thu, 25 Sep 2025 23:24:49 +0800
Subject: [PATCH] perf(sqlx-mysql): Reserve capacity for
 `MySqlArguments::null_bitmap`

Reserve capacity for `MySqlArguments::null_bitmap`

Signed-off-by: paulip1792 <paulip1792@outlook.com>
---
 sqlx-mysql/src/arguments.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sqlx-mysql/src/arguments.rs b/sqlx-mysql/src/arguments.rs
index 306431039d..deb3ea4226 100644
--- a/sqlx-mysql/src/arguments.rs
+++ b/sqlx-mysql/src/arguments.rs
@@ -42,6 +42,7 @@ impl Arguments for MySqlArguments {
 
     fn reserve(&mut self, len: usize, size: usize) {
         self.types.reserve(len);
+        self.null_bitmap.reserve(len);
         self.values.reserve(size);
     }
 
@@ -75,6 +76,10 @@ impl NullBitMap {
         self.bytes[byte_index] |= u8::from(is_null.is_null()) << bit_offset;
         self.length += 1;
     }
+
+    fn reserve(&mut self, len: usize) {
+        self.bytes.reserve(len / (u8::BITS as usize) + 1);
+    }
 }
 
 impl Deref for NullBitMap {